How a JAR file can read an external properties file

Question

We have a connection pooling component (JAR file) for one of our application. As of now the application connection details are bundled with-in the JAR file (in .proper

Answer 1

Simplest way is below. It will load application.properties from cfg folder outside of the jar file.

Directory Structure

  |-cfg-->application.properties
  |-somerunnable.jar

Code:

    Properties mainProperties = new Properties();
    mainProperties.load(new FileInputStream("./cfg/application.properties"));
    System.out.println(mainProperties.getProperty("error.message"));